1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754cb7e0d48a8360c9fe55436f849d6e84cf5911dc0cbd147ace4c383cb33b3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79e06aff-dde9-48f5-ba20-d49bfb123440.json and https://artists.proofprofile.net/proofs/artist/79e06aff-dde9-48f5-ba20-d49bfb123440.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca4f75aee43700506c9ceaa5ece6b717b4f4f67f62751bb171cda41e1c39726. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ41972514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca4f75aee43700506c9ceaa5ece6b717b4f4f67f62751bb171cda41e1c39726. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ41972514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025724341395603ff32fa74421a8e3d83409cfbfc3593c84060e4e905210b443. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ41972515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe8da1dbe31107412c0b700127f80463344e255b8f54875d8f042027910d8f6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB2113631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918605981dc68cc1b0954246da1d4744be47f92763aaa849242a9c3012fe9d3f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2102842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe8da1dbe31107412c0b700127f80463344e255b8f54875d8f042027910d8f6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB2113631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc3f1a45f008d78deae7ba9b47ed435995673a18dca808237dffc362c525f94. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:40:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2005487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb09e15e05ce49b965b7855de1c82ee007dfb87ca9909cbc7c2c159dee50dbd3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:01:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2102847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b0bb9e68d69626fa7a05d9fab136a9674525c764f0522f1109c7f7c923187f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2363618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b0bb9e68d69626fa7a05d9fab136a9674525c764f0522f1109c7f7c923187f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2363618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d27af87f222a52faffae748bc7992cc5eb56065ec614ca07f26a1c141551a9a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2419462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67918a84b9baad69f692a0eee8d808359ca3975fc912c3d1efde1a7228f56599. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2510555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96152f94546c99d9a11e6f78e5f7145f51fd471e98940ba5979fe3e7c6f86d80. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2508692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631665277b8f632a3621f5379e2b2ff0a4afa522460b5a0d4c9373bf09d0b545. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2510560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f88d4e3dccfbec4f59fcf0712ea13efbd6be3315006aa8cbab50be42b0da5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2510559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6a59c100df980a597c8ebadd70d4d69ebb945f2b2ecf8a675f312893af516. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2510558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b634eba5275d8a734a98fe7083ba85c8261d51f852187365ae5ab74da25710. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2510564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1943202417bd0ade727511fffb42392446bcd07eb05f6ab4ff56f72e574949c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2081979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a321dc0364f30fe5866521bd0487b6abe164183c49f0959e0e364498d78fb07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2366604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab418da4650f8c792170810b19da74f11a696aa051a2147b09e795f3bc1f1742. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32138212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb80b7cb5295e365bed048ea328c8812899329d9f2d928bd2c24b0b2f1cbf42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32138213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afccda2440e68736d1784b038167cba8badfd4b434f5e0bb00aa44935f04df2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32138211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46ba8f4bc64e72183cb3a282dcbf8f2d76a0ccc4fe7f0235a159ed060ed807. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2217877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acf85cf087c8ffa10b77f1c05dc179f14b89a9caa2d879209d45031aafad3b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2045101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742a5850534ebe8abc70ca3f5c8fa2b79faeca7649e32c5e92db9fda2d8f141. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2516181.